by google

google / re2

RE2 is a fast, safe, thread-friendly alternative to backtracking regular expression engines like tho...

5.2K Stars 779 Forks Last release: 27 days ago (2020-10-01) Other 832 Commits 54 Releases

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This is the source code repository for RE2, a regular expression library.

For documentation about how to install and use RE2, visit

The short version is:

make make test make install make testinstall

There is a fair amount of documentation (including code snippets) in the re2.h header file.

More information can be found on the wiki:

Issue tracker:

Mailing list:

Unless otherwise noted, the RE2 source files are distributed under the BSD-style license found in the LICENSE file.

RE2's native language is C++.

The Python wrapper is at and on PyPI (

A C wrapper is at An Erlang wrapper is at and on Hex ( An Inferno wrapper is at A Node.js wrapper is at and on NPM ( An OCaml wrapper is at and on OPAM ( A Perl wrapper is at and on CPAN ( An R wrapper is at and on CRAN ( A Ruby wrapper is at and on RubyGems (

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